Is day3 cheaper than Mailchimp?

Usually, for a growing list, because day3 never charges by contact count. Your bill tracks emails sent, not audience size. The gap widens the less often you send: a list you email monthly costs the same on day3 as one you email never, and per-contact pricing charges for both identically.

Can I migrate my Mailchimp list to day3?

Yes, by CSV or API. Export your subscribers and import them into a day3 audience, or script it against the API in batches of 1,000, bringing your custom fields and opt-outs with you. Either way the import dedupes and drops anyone who unsubscribed or bounced.

What does day3 not do that Mailchimp does?

By design: no automation flows, A/B testing, drag-and-drop template builders, landing pages, or ads. Just reliable product emails, with saved segments and subscription topics where they earn their keep.

Do my Mailchimp tags and segments survive the move?

Tags import as custom fields, which register themselves as merge tags, and you can rebuild saved segments on top of them. The segments are live rather than snapshots, so they re-evaluate as contacts change. Complex nested segment logic may need simplifying.

Will moving hurt my deliverability?

Not if you bring your suppression list first and authenticate the same sending domain. Reputation attaches to your domain rather than to the tool, so a move that keeps the domain and honours the existing opt-outs is close to invisible to mailbox providers. Sending your first day3 campaign to your most engaged segment rather than the whole list is the usual extra precaution.

All comparisons

day3 vs. Mailchimp

A Mailchimp alternative that charges for sends, not your list size.

Mailchimp is a broad marketing platform, and its bill climbs as your contact count grows, even in a month you send nothing.

	day3	Mailchimp
Pricing model	By emails sent each month	By number of contacts/audience size
Subscriber limits	Unlimited on every plan	Tiered: more contacts cost more
Product scope	Product updates and transactional email, on purpose narrow	Full marketing suite (automations, ads, CRM, sites)
Cost of a quiet month	Nothing changes. The meter only moves when you send	The contact bill arrives either way
Best for	Founders & small SaaS sending updates	Marketing teams running campaigns at scale
Starting price	$1/mo for 1,000 emails	Free tier, then priced by contacts

Comparison reflects each product's pricing model and scope, not specific prices, because those change, so always check the latest on Mailchimp's own site.

The core difference

day3 decouples list size from price. Keep any number of subscribers and pay only for the emails you send, so a big list you email occasionally costs far less.

The same numbers, both ways

10,000 users on the list, emailed twice a month: one changelog and one launch note.

On day3

$8/mo

20,000 sends a month fits the 25,000-email plan. 10,000 subscribers costs nothing, on this plan or any other.

On Mailchimp

Depends

A per-contact plan bills for all 10,000 contacts every month, whether you send twice, once, or not at all. We don't print their price here, because it changes and a stale figure would be worse than none. Check it on their own site and run these numbers through it.

Why teams move to day3

No contact tax

200 contacts or 200,000, same price. The meter is sends, nothing else.

Nothing to configure

No journeys or automation to wire up first. Write the update, pick a list, send. Saved segments are there if you want them, not a prerequisite.

Deliverability included

Authenticated domains, one-click unsubscribe, and auto-suppression come standard, not as an upsell.

When Mailchimp is the better choice

Stay with Mailchimp if you need automation flows, landing pages, ads, or a CRM in one place. day3 does none of that, and automations are still in development rather than shipped. Stay too if a marketing team rather than a founder owns your email, because the collaboration, approval and reporting depth Mailchimp has built for that job is real and day3 has not tried to match it. day3 just emails your users about product changes.

Moving your list across

Five steps, in this order. The first one is the one people skip.

1

Bring your suppression list first

Push the addresses that bounced, complained, or asked never to be mailed again before you import a single contact. Do it in this order and day3 refuses those rows on the way in, which is the guard working rather than an error. Do it after and you have a window where a re-import can mail someone who already left.

2

Import the contacts

Export your Mailchimp audience to CSV and upload it with email, first_name and last_name columns. day3 dedupes, skips anyone already suppressed, and lets you retry just the failed rows instead of restarting the batch. Or script it against the API in batches of 1,000 if you'd rather not touch a spreadsheet.

3

Carry the opt-outs across as opt-outs

Contacts already marked unsubscribed import with that status and the date they left on, so your new tool honours a decision made in your old one. Nobody gets re-subscribed by a migration.

4

Verify the sending domain

Connect Cloudflare and day3 publishes DKIM, SPF and DMARC for you, then rechecks until the domain verifies. On another DNS host you get the records to paste. Authenticating the domain you already send from is what keeps your reputation intact through the move.

5

Send one real campaign to yourself

A test send goes to addresses you name, through the same pipeline and the same tracking as the real thing. Compare it against your old tool's output before you point the whole list at it.

What doesn't come across

Automation journeys, landing pages, ad audiences and the CRM don't come across, because day3 has none of them. Neither do drag-and-drop template designs: your emails get rebuilt in day3's composer. Tags become custom fields and saved segments, which usually maps cleanly, but a Mailchimp account leaning hard on journeys is not a Mailchimp account day3 can replace.

Questions

Is day3 cheaper than Mailchimp?: Usually, for a growing list, because day3 never charges by contact count. Your bill tracks emails sent, not audience size. The gap widens the less often you send: a list you email monthly costs the same on day3 as one you email never, and per-contact pricing charges for both identically.
Can I migrate my Mailchimp list to day3?: Yes, by CSV or API. Export your subscribers and import them into a day3 audience, or script it against the API in batches of 1,000, bringing your custom fields and opt-outs with you. Either way the import dedupes and drops anyone who unsubscribed or bounced.
What does day3 not do that Mailchimp does?: By design: no automation flows, A/B testing, drag-and-drop template builders, landing pages, or ads. Just reliable product emails, with saved segments and subscription topics where they earn their keep.
Do my Mailchimp tags and segments survive the move?: Tags import as custom fields, which register themselves as merge tags, and you can rebuild saved segments on top of them. The segments are live rather than snapshots, so they re-evaluate as contacts change. Complex nested segment logic may need simplifying.
Will moving hurt my deliverability?: Not if you bring your suppression list first and authenticate the same sending domain. Reputation attaches to your domain rather than to the tool, so a move that keeps the domain and honours the existing opt-outs is close to invisible to mailbox providers. Sending your first day3 campaign to your most engaged segment rather than the whole list is the usual extra precaution.